Description : The .fadeIn() method is used to gradually change the opacity of an element to make it visible.
Answer :
The `.fadeIn()` method in jQuery is used to gradually change an element’s opacity from hidden to visible. This is accomplished with a fading animation. For instance,`$('#elementId').fadeIn('slow')` will cause the element with the ID`elementId` to fade in over a slow duration. The `.fadeIn()` method is often used to create smooth transitions and enhance user experience by animating elements when they appear.